Implementation and control of a double-input DC/DC converter for PEMFC/battery hybrid power supply

Abstract

Proton exchange membrane fuel cell (PEMFC) has a time-delay feature on its electrical characteristic. So other energy sources with relatively higher response rate and better dynamic performance is necessary for assisting and sharing responsibility with PEMFC in hybrid power supply system. Multi-input DC/DC converter, which has higher efficiency, less component count, lower cost and simpler control method, is a promising candidate for developing multi-source hybrid system. In this paper, a double-input buck converter (DIBC) topology and its control method are proposed and designed. The target of regulating both the DIBC output voltage and output current of PEMFC is proved to be feasible. A prototype of PEMFC/battery hybrid power supply system based on the proposed DIBC topology is developed for verifying the correctness of the presented theory and design. Experimental result shows ideal output characteristics and control effect of the prototype. Keywords-proton exchange membrane fuel cell; time delay; double-input buck converter; hybrid power supplyI.

Exact steady‐state analysis in multiple‐input converters applied with diverse time‐sharing switching schemes

“…Owing to page limitation, MIbC is used to serve as an illustrative example because of its straightforward circuit configuration and high-frequent appearance in MIC applications [1,5,[7][8][9]13]. The contents of the paper are organised as follows: exact steady-state analysis and derivation in MIbC, based on TEM and IDEM TSS functions and operating in CCM and DCM, will be, respectively, discussed in Section 2; followed by the proposed generalisation procedures in Section 3, series of analytical expressions for rest of the MIC topologies besides MIbC could be established (two typical ones will be listed in Appendix); a MIbC prototype with two input legs will be implemented and studied for theoretical verification in Section 4; finally, conclusions will be drawn.…”

“…The identical relation to (5) between inputs and output is also available from the inductor volt-second balance principle [1,5,8,17,18]. Owing to the principle of iterative algorithm, the terms i L (t 1 ) to i L (t m+1 ) in (1) can be replaced with their upper sub-equations, finally uniformly expressed with the initial value, i L (t 0 ) (see (6) at the bottom of the next page)…”

“…In order to overcome this obstacle, the improved strategy, called asynchronous-triggered TEM, was proposed as is illustrated in Fig. 2b [6][7][8][9][10]. The conduction periods of all switching patterns are separated while conduction consecutiveness…”

Subproportion control of double input buck converter for fuel cell/battery hybrid power supply system

“…(8) with the specific parameters in practice, one can solve the control-to-output TF through G(s) = C(sI − A) −1 B + D, where I is the identity matrix. On mapping to…”

Circuitry and analysis of input‐capacitor‐added multiple‐input buck converters

“…ICA topic was untouched in this literature, either. In the previous work by Xian et al [23], ICA MIBC circuit was designed and prototyped, with brief discussion on ICs, for a FCs/battery REHS. On the premise of guaranteeing input current continuous for longer operation lifetime of the FCs, the system successfully realised the control target that to regulate both output voltage of the ICA DIBC and input current of the FCs simultaneously.…”